BIOL 032-Human Physiology 2) Which of the following promotes YASODILATION A. Nit
ID: 3480329 • Letter: B
Question
BIOL 032-Human Physiology 2) Which of the following promotes YASODILATION A. Nitric oxide B. Carbon dioxide C. Adenosine D. Prostacyclin E. All of the above 33) What happens when EUNNY channels open? A. Membrane repolarization B. Membrane depolarization C. Membrane hyperpolarization D. A& B E. A, B&C; 34) Which of the following is a "STEREOTYPED" response from non-specific defenses to tissue injuries? A. Fever B. Antimicrobial proteins C. Helper T cell Activation D. Cellular barricade E. Inflammation 35) Which of the following components is part of muscle SPINDLES? A. Gamma-motor neurons B. Alpha-motor neurons C. Beta-motor neurons D. A&B; E. A, B& C 36 Which of the following structures functions as a receptor for the sense of BALANCE? A. Ganglion cells B. Cochlea C. Photoreceptors D. Vestibular complex E. Bipolar cells 37) Which of the following is CORRECI about sympathetic release of norepinephrine? A. B. C. D. E. Vasoconstriction of arterioles Mean arterial pressure is increased Total peripheral resistance is increased A&B; A, B&C; Which of the f ollowing channels mediates the LATTER period of spontancous depolarization to threshold? Muscarinic cholinergic receptors L-type calcium channels A. B. c. Adrenergic receptors D. T-type calcium channels E. Nicotinic cholinergic receptors 39) Golgi tendon organs rely on typeafferents to send SENSORY information toward the CNS. A. la B. Ib D. A&EB; E. A, B&C; Page 5 of 8Explanation / Answer
32) Nitric oxide is a vasodilator as its signals the smooth muscles of the blood vessels to relax. This results in increased blood flow due to vasodilation. It binds to the heme moiety of cytosolic Guanylate cyclase to increase cGMP level that increase protein kinase signaling. Nitric oxide is synthesized by endothelial cells.
Option A.
33) Funny channels are small leaky Na+ channels. Opening of funny channel will cause slow membrane depolarization. They are important in cardiac functions. They are not voltage gated and are continuously open.
Option B.
34) Inflammation is the stereotyped response of non-specific or innate immunity. It is a biological and chemical response to harmful pathogens. The tissue is inflamed to remove the harmful pathogens and initiate healing of damaged tissue.
Option E.
35) Muscle spindles are sensory receptors in the muscle that detect changes in length of the muscle. They contain 3-12 muscle fibers. Gamma motor neurons innervate the intrafusal muscle spindles and are not contractile. The muscle spindle is a proprioceptor located deep within the muscle. It is parallel to the extrafusal muscle fibers. Very few beta motor neurons are present in muscle spindle
Alpha motor neurons innervate the extrafusal muscle spindles and are used for prolonged contraction. Extrafusal muscles allow movement by generating tension due to contraction.
Option A.
36) The vestibular complex in the ear is the component of the ear that is involved in sense of balance. The semicircular canal in the vestibular complex contains tiny hair. Body movements will cause tilting of the fluid in the canals. As a result, the hair cells move and impulses are sent to the brain detecting the body movement.
Option D.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.