PHYSIO 261 Lecture Final Review Latest Update 2025-2026 Exam 100 Questions with 100% Verified Correct Answers Guaranteed A+
________ is composed of multiple globular molecules polymerized to form long chains or filaments.
- Actin
- Tropomyosin
- Troponin
D) Myosin - CORRECT ANSWER: A) Actin
.________ is the backup energy molecule that can be rapidly converted to ATP in active skeletal muscle.
- protein
- glucose
- phosphocreatine
D) fatty acid - CORRECT ANSWER: C) phosphocreatine
A denatured protein has lost its shape, function and hydrogen bonds. T/F - CORRECT
ANSWER: True
A triglyceride molecule is made up of
- one fatty acid and three glycerols
- one glycerol and three fatty acids
- two fatty acids and two glycerols
D) one glycerol and two fatty acids - CORRECT ANSWER: B) one glycerol and three
fatty acids
ACE converts angiotensin I to angiotensin II. T/F - CORRECT ANSWER: True 1 / 3
Acromegaly is caused by excess Growth hormone production in adulthood. T/F -
CORRECT ANSWER: True
Action Potential
- is always one way
- can be summed
C) neither of the answers are correct - CORRECT ANSWER: A) is always one way
After a hormone has exerted its effects, it typically
- continues to act until an opposing hormone is secreted
- is inactivated or removed from the blood
C) spontaneously degrades - CORRECT ANSWER: B) is inactivated or removed from
the blood
Anterograde and retrograde axonal transport are forms of ________ transport
- fast
- slow
C) none of the answers is correct - CORRECT ANSWER: A) fast
As ATP binds to the myosin head at the beginning of a muscle contraction cycle, the myosin head immediately
- tightens its bond to actin.
- detaches from actin.
C) initiates binding with actin. - CORRECT ANSWER: B) detaches from actin
As blood vessel length increases
- flow decreases only.
- friction decreases only. 2 / 3
- resistance increases and flow decreases.
- resistance increases only. - CORRECT ANSWER: C) resistance increases and flow
decreases.
Bile is
- produced by hepatocytes only.
- released into the stomach only.
- produced by hepatocytes and the gallbladder
D) produced by the gallbladder only - CORRECT ANSWER: A) produced by
hepatocytes only.
Chief cells secrete
- mucus
- gastrin
- pepsinogen.
D) hydrochloric acid - CORRECT ANSWER: C) pepsinogen.
Compared to skeletal muscle, contraction of smooth muscle cells
- only sustained without fatigue
- a slower response to a stimulus and sustained without fatigue
- only a slower response to a stimulus
D) only controlled by the somatic nervous system - CORRECT ANSWER: B) a slower
response to a stimulus and sustained without fatigue
Cysts on the kidney can press upon nephrons, raising the pressure inside the nephrons.How will this affect glomerular filtration rate and blood pressure?
- GFR increases and blood pressure increases
- GFR increases and blood pressure decreases
- GFR decreases and blood pressure decreases
- / 3