Exam 3: BIO 201 Human Anatomy and Physiology I Questions with Verified Answers |Latest 2024/2025
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Course
BIO 201
Institution
BIO 201
What is the synaptic knob? Swollen end of nerve fiber at each synapse.
What is the first step of contraction? The enzyme ATPase hydrolyzes ATP, the energy released activates the head and "cocks" into a high energy position. Keeps ADP and phosphate group bound to it.
Describe stability. ...
Exam 3: BIO 201 Human Anatomy and Physiology I
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Questions with Verified Answers. i- i- i-
What is the synaptic knob?
i- i- i- i- i-i- i- Swollen end of nerve fiber at each i- i- i- i- i- i- i-
synapse.
What is the first step of contraction?
i- i- The enzyme ATPase hydrolyzes
i- i- i- i- i-i- i- i- i- i- i-
ATP, the energy released activates the head and "cocks" into a high
i- i- i- i- i- i- i- i- i- i- i- i-
energy position. Keeps ADP and phosphate group bound to it.
i- i- i- i- i- i- i- i- i-
Describe stability. Prevents unwanted movements, there are some
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muscles known as the antigravity muscles that fight against gravity that
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help us not fall over or slump.
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What important enzyme does the basal lamina have?
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Aceylcholinesterase (AChE) i-
What does the synaptic knob contain? What is contained in those?
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Contained is synaptic vesicles. Inside of these vesicles is acetylcholine
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(ACh)
What is the fifth step of excitation?
i- i- Areas of the sarcolemma have
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voltage regulated ion gates that open in response to EPP, some of these
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gates are Na(+) and allow it to enter and others like (K+) allow it to leave.
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,What do synaptic vesicles undergo & what happens?
i- i- i- i- i- i- i- i-i- i- They undergo i- i-
exocytosis and release ACh into the synaptic cleft.
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What is the synaptic cleft?
i- i- i- i- i-i- i- The tiny gap that separates the synaptic
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knob and the sarcolemma.
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What is a Schwann cell?
i- i- i- i- i-i- i- Envelops entire junction and isolates from i- i- i- i- i- i-
surrounding tissue fluid. i- i-
What is the perimysium layer?
i- i- Thicker connective tissue sheath that
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wraps muscle fibers together in bundles called fassicles.
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What are fassicles?
i- i- i-i- i- Bundles of muscle fibers together i- i- i- i-
Are fassicles visible to the naked eye, and if so what do they look like?
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Yes fassicles are visible to the naked eye, and they appear as parallel
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strands.
What does the perimysium carry?
i- i- i- i- i-i- i- Larger blood vessels, larger i- i- i- i-
nerves, and muscle spindles
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What is the epimysium layer?
i- i- i- i- i-i- i- The fibrous sheath that surrounds the
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entire muscle i-
, What is the fascia?
i- i- Sheet of connective tissue that separates
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neighboring muscles or muscle groups from each other and from the
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subcutaneous tissue. i-
What are the two types of muscle attachments?
i- i- i- i- i- i- i- i-i- i- 1. Indirect
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2. Direct
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What is an indirect attachment?
i- i- i- The muscle ends short of its bony
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destination and the gap is bridged by a tendon.
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What is a tendon?
i- i- i- i-i- i- Fibrous band or sheet i- i- i-
What is direct attachment?
i- i- There is so little separation between
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muscle and bone that to the naked eye, the red muscular tissue seems to
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emerge directly from the bone.
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What is the origin?
i- i- i- i-i- i- The bony site of attachment at the relatively
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stationary end. i-
What is the insertion?
i- i- i- i-i- i- Attachment site at its more mobile end i- i- i- i- i- i-
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