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Human Physiology
Study weeks 1-6
| Question | Answer |
|---|---|
| The contraction of the uterus during the birth of a baby is an example of _____ feedback. | negative |
| If the secretion of oxytocin during childbirth operated as a negative-feedback control loop, what effect would it have on uterine contractions? | Oxytocin would stimulate stronger uterine contractions. |
| Negative-feedback mechanisms: | minimize changes in blood glucose levels. maintain homeostasis. are responsible for an increased rate of sweating when air temperature is higher than body temperature. All of the above are correct. |
| Intrinsic control: | is sometimes called autoregulation. |
| A _____ is a functional group that is temporarily unattached and is highly reactive because of unpaired electrons. | free radical |
| Which lipid acts as a “tissue hormone”? | Prostaglandin |
| A structural lipid found in the cell membrane is a: | phospholipid. |
| A DNA molecule is characterized by all of the following except: | ribose sugar. |
| Two solutions of different concentrations of glucose are separated by a membrane that allows both glucose and water to pass through. When dynamic equilibrium is reached, there will be: | an even exchange of material across the membrane |
| 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 |
| Which of the following epithelial functions is a primary activity of glandular epithelium? | Secretion |
| Which of the following is not a characteristic of skeletal muscles? | Having voluntary or “willed” muscles |
| Because of how the clavicle articulates with the scapula, all shoulder movements involve the sternoclavicular joint. | True |
| Blood calcium levels involve secretion of which two hormones? | parathyroid and calcitonin |
| As the activity of osteoblasts increases, the: | amount of calcium in bone increases. level of calcium in the blood decreases. Both B and C occur. |
| In terms of function, which is considered an immovable joint? | Synarthrosis |
| Muscle contractions will continue as long as: | the calcium ions are attached to the troponin. |
| Glucose can be stored in the muscle as: | glycogen. |
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Debragal03
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