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Exam 3
| Question | Answer |
|---|---|
| Thin Filaments are composed of | Actinin, troponin, and tropomyosin |
| What is an adducter? | A term for a muscles action |
| The cell membrane of a muscle cell is called | sarcolemma |
| The striated appearance of skeletal muscle results from | actin and myosin arrangement |
| The deltoid acts to | abduct the arm |
| The activity that directly triggers the sarcoplasmic reticulum to discharge calcium is when | an action potential propagates across the sacroplasm and down the T tubules |
| Acetylcholine receptor binding triggers sodium to | exit the muscle cell |
| After death, rigor mortis lasts until | myofilaments are broken down |
| Neurotransmitters that cause skeletal muscle contraction are normally stored in | motor neuron axon terminals |
| During muscle contraction the ________ get(s) smaller. | I and H bands |
| The skeletal muscles store calcium ions in the terminal cisternae (lateral sacs) of the | sarcosplasmic reticulum |
| Worn-out red blood cells are removed from the circulation in the _________. | liver and spleen |
| In adults, the stem cells responsible for the production of red and white blood cells originate primarily in the | red bone marrow |
| The clotting pathways require large amounts of | calcium |
| The function of hemoglobin is to | bind and transport oxygen and carbon dioxide |
| Megan has type O blood. What blood type would cause agglutination or cross reaction with her blood? | Types A, B, and AB |
| Sylvia is pregnant and experiencing anemia. As a result of her ________, her kidneys will attempt to re-establish homeostasis by releasing ________. | hypoxia ; erythopoietin |
| For erythropoiesis to proceed normally, protein synthesis requires adequate supplies of factors, such as vitamin B12, which is absorbed from the diet in the presence of which of the following? | EPO |
| Without mitochondria, RBCs are relatively inefficient in terms of energy use. However, how could it be advantageous for RBCs to accomplish their function? | It ensures that any oxygen the RBCs carry will be delivered to peripheral tissues. |
| Type AB blood contains | agglutinogen A and agglutinogen B. |
| During their formation, RBCs | flatten |
| The inherited condition resulting from the inadequate production of clotting factors is termed | hemophilia |
| The plasma component with a role in blood clotting is called | fibrinogen |
| A disease that altered collagen fiber structure so that platelets no longer adhered might be expected to | compromise the intrinsic clotting pathway. |
| The phase of ventricular systole that creates enough pressure to open the semilunar valves is | early diastole? |
| The right atrium receives blood from the | superior and inferior vena cava |
| ________ is a condition in which the heart rate is slower than normal. | Bradycardia |
| Cardiac muscle cells have abundant reserves of myoglobin, which function in ________. | storing oxygen |
| Atrioventricular valves prevent backflow into the | atria |
| Parasympathetic neurons that slow heart rate are contained in the | cardiac inhibatory center |
| Ventricular systole is triggered by the | Purkinje fibers |
| Which of the following is greatest during left ventricular systole? | pressure in the ventricle |
| The pacemaker of the heart is normally the | SA node |
| In ventricular reflex, a more powerful contraction results in | increased stoke volume |
| In general, for a vessel of a given size, a typical artery ________ compared to a typical vein. | is more elastic |
| The vessel that collects systemic blood from all structures inferior to the diaphragm is the | inferior vena cava |
| Which of the following has the greatest effect on blood flow to the tissues? | peripheral resistance |
| Which of the following will NOT decrease venous return? A) skeletal muscle contraction B) dehydration C) reduction of peripheral blood flow D) bleeding E) excessive water loss at the kidneys | skeletal muscle contraction |
| In a fetus, blood from the right atrium can flow freely to the left atrium through the ________, thus bypassing the pulmonary circuit. | foramen ovale |
| The lower limbs are drained by tributaries of the | common illiac veins |
| The vessel that supplies blood to the brain is the ________. | common carotid artery |
Created by:
iessnorris