Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Vanessa Irish

Physiology Midterm Questions

QuestionAnswer
Of the 11 major body systems, which is the least involved in maintaining homeostasis? Reproductive
The normal reading or range of normal is called the: set point
The term that literally means self-immunity is: autoimmunity
Positive-feedback control systems: accelerate a change
Of the 11 major body systems, which is the least involved in maintaining homeostasis? Reproductive
Shivering to try to raise your body temperature back to normal would be an example of: The body maintaining homeostasis and negative-feedback mechanism
If the secretion of oxytocin during childbirth operated as a negative-feedback control loop, what effect would it have on uterine contractions? Oxytocin would inhibit uterine contractions.
Intracellular parasites that consist of DNA or RNA surrounded by a protein coat and sometimes by a lipoprotein envelope are called: viruses.
Homeostasis can best be described as: a state of relative constancy.
Sometimes referred to as animal starch, _____ is the main polysaccharide in the body. glycogen
Which level of protein structure refers to the number, kind, and sequence of amino acids? Primary
The roles played by proteins can be divided into which categories? Structural and functional
DNA: is a double-helix strand of nucleotides.
The alpha helix is an example of which level of protein structure? Secondary
When two molecules of glucose are joined, they form which disaccharide? Maltose
The amino group in an amino acid is: NH3+
Unsaturated fats: will kink or bend because of the double bonds between the carbon atoms.
Which lipid acts as a “tissue hormone”? Prostaglandin
Which energy-releasing or energy-transferring molecule does not contain a nucleotide? Creatine phosphate
What is the most important factor in determining the physical and chemical properties of fatty acids? Degree of saturation
Which of the following is not one of the major groups of organic substances in the human body? Salts
Prostaglandins and steroids share which of the following characteristics? Both have a ring structure in their molecule.
Extensive weight training causes the muscle cells to: hypertrophy.
Phagocytosis is an example of: endocytosis.
Water will move through the cell membrane by: osmosis.
The pairing of bases of a strand of DNA is obligatory. If a strand of DNA were composed of the base sequence of ATCG, what would be the obligatory sequence of its opposing base pairs? TAGC
Transcription can be best described as the: synthesis of mRNA.
Diffusion of particles through a membrane by means of a carrier molecule is called: facilitated diffusion.
Which term is synonymous with tumor? Neoplasm
Which is not true about the sodium and potassium pump? Sodium moves into the cell and potassium moves out of the cell.
Materials can be moved from a low concentration to a high concentration through: active transport.
A saline solution that contains a higher concentration of salt than a red blood cell would be: hypertonic.
The correct order of the phases of mitosis is: prophase, metaphase, anaphase, telophase.
During which stage of mitosis do the centrioles move to the opposite poles of the cell? Prophase
All of the following occur as a result of meiosis except: chromosome number remains at 46.
The small water channels in the cell membrane are called: aquaporins.
Which tissue is most likely to form a keloid scar as it heals? Connective
Mucous membranes are important because they lubricate and protect passageways. True
Hematopoietic tissue can be found in the: bones.
Areolar tissue usually contains which types of cells in the greatest number? Fibroblasts
Connective tissue forms from stem cell tissue called: mesenchyme.
Which cells form the blood-brain barrier that protects the brain from harmful substances in the blood? Astrocytes
The hypodermis: connects the dermis to underlying tissues.
Which cells help destroy pathogens and damaged tissue in the brain? Microglia
The area referred to as true skin is the: dermis
Which of the following is not a characteristic of connective tissue? Typically holds its cells together tightly by means of desmosomes
Which cells electrically insulate axons to increase the speed of conduction? Oligodendrocytes and Schwann cells
A tissue is: a group of similar cells that perform a common function.
Which of the following is not a function of the skin? Synthesis of vitamin E
Which of the following is not a characteristic of smooth muscles? Having intercalated disks
Which of the following is not a characteristic of muscle tissue? Cells are separated by a large quantity of extracellular matrix
Which type of tissue has the greatest capacity to regenerate? Epithelial
Which type of connective tissue helps newborns maintain body temperature by producing heat? Brown fat
Which of the following is not a characteristic of the diaphysis? Provides a bulbous shape for attachment of muscle
Due to how the clavicle articulates with the scapula, all shoulder movements involve the sternoclavicular joint. True
Which structures are unique to the fetal skull and provide additional space for molding the head shape as the baby passes through the birth canal? fontanels
In bone formation, the cells that produce the organic matrix are the: osteoblasts.
Bones act as a reservoir for which of the following minerals? Calcium and Phosphorus
An age-related skeletal disease that is characterized by loss of bone mineral density and increased bone fragility is osteoporosis.
Small cells that synthesize and secrete a specialized organic matrix are osteoblasts.
True or False: Young children’s bones have a greater risk of fracturing because of incompletely ossified bone. False
As the activity of osteoblasts increases, the: amount of calcium in bone increases and level of calcium in the blood decreases.
True or False: One similarity between the structures of the foot and hand is the equivalent degrees of movement of both the thumb and the big toe. False
Appositional growth of cartilage occurs when chondrocytes begin to divide and secrete additional matrix.
The human hand has greater dexterity than the forepaw of any animal because of the freely movable joint of the: thumb
The ulna articulates proximally with the: humerus
The primary ossification center of a long bone is located: in the diaphysis
Moving a body part away from the medial plane of the body is called: abduction
The ability of muscle cells to respond to nerve stimuli is called: irritability
Endurance training is also known as: aerobic training
The largest and most frequently injured joint is the: knee
Cross-bridges are also called: myosin heads
During which phase of the twitch contraction is there a triggering of the release of calcium ions into the sarcoplasm? Latent period
Physiological muscle fatigue may be caused by: a relative lack of ATP, high levels of lactate, failure of the sodium-potassium pumps
The substance that attracts oxygen in the myoglobin molecule is: iron.
White fibers are also called _____ fibers. fast
The first event to occur in muscle relaxation is that: the sarcoplasmic reticulum begins actively pumping calcium back into its sacs.
The type of movement possible at a synovial joint depends on the: shape of the articulating surfaces of the bones.
Skeletal muscles are innervated by somatic motor neurons
Which of the following statements about cardiac muscle is incorrect? Cardiac muscle requires nervous stimulation to contract.
In terms of function, which is considered an immovable joint? Synarthrosis
Attempting to pick up an object too heavy to lift would result in which type of muscle contraction? Isometric
Muscle contractions will continue as long as: the calcium ions are attached to the troponin.
The brief period during which a local area of an axon's membrane resists re-stimulation is called the __________ period. refractor
Severe depression can be caused by a deficit in certain brain synapses of: amines.
Which of the following is not used by the body as a neurotransmitter? All of the above are used by the body as neurotransmitters: Nitric oxide, Acetylcholine, Carbon monoxide
The neurotransmitter(s) that inhibit(s) the conduction of pain impulses is(are): enkephalins.
When an impulse reaches a synapse: chemical transmitters are released.
Which is true of an action potential? The outside of the plasma membrane is negatively charged, and the inside is positively charged.
Neurotransmitters are released in a synapse and bind to: receptors on the postsynaptic neuron.
The fastest nerve fibers in the body can conduct impulses up to approximately _____ meters per second. 130
The only ion(s) that can diffuse across a neuron’s membrane when the neuron is at rest is (are): potassium.
The active transport mechanism in the plasma membrane that transports sodium and potassium ions in opposite directions and at different rates is the sodium-potassium pump.
A slight shift away from the resting membrane potentials in a specific region of the plasma membrane is called a _____ potential. local
Within the nervous system, coding for the strength of a stimulus is accomplished through: the frequency of nerve impulses.
No impulse can be sent through a neuron: during the absolute refractory period.
The first event to occur when an adequate stimulus is applied to a neuron is: some of the sodium channels at the point of stimulation open.
When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called: saltatory conduction.
During a relative refractory period: the action potential can be initiated with a strong stimulus.
The neurotransmitter(s) that inhibit(s) the conduction of pain impulses is(are): enkephalins.
Compared with the outside of the neuron, the inside has a(n) ____ charge. negative
Created by: VanIri86
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards