Is the functional relationship between RyR and DHPR a tip-link mechanism? If not,
what is the functional relationship?
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No, the functional relationship between RyR and DHPR is not a tip-link
mechanism. DHPR moves out of the way of RyR, exposing its calcium
channels.
TRUE OR FALSE: The majority of hormones are steroids.
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FALSE: The majority of hormones are polypeptides.
,Which of the following sequence of hormones accurately represents the body's
response to stress? Start with the hypothalamus output on the left.
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CRH → ACTH → Cortisol
In the adrenal cortex, the cells of the zona _____ primarily secrete cortisol and cells of
the zona ______ are the primary source of androgens.
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fasciculata; reticularis
When a sarcomere is at rest, what is the conformation of the myosin head? In other
words, is it pointing toward the M line or Z line?
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When a sarcomere is at rest, the myosin head is pointing towards the Z line.
How do muscle types differ?
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keletal muscle is attached to the skeleton, it is striated, and it is under
voluntary control. Cardiac muscle is the muscle of the heart, it is striated,
and it is under involuntary control. Smooth muscle is found in places like
, the GI tract and the vasculature, it is not striated, and it is under involuntary
control.
True or false: The endocrine system includes organs which are components of other
organ systems, such as the heart.
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TRUE: Many organs function as endocrine components and as part of other
organ systems, such as the heart, brain, kidneys, and GI tract.
A physiologically inactive precursor of a hormone is called a(n)
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prohormone or preprohormone
The length at which skeletal muscle fibers develop the greatest isometric active
tension is termed the
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optimal length
The hormone that is the major glucocorticoid secreted by the adrenal cortex is
, Give this one a try later!
cortisol
Why doesn't smooth muscle contract in a linear plane like skeletal and cardiac
muscle?
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Smooth muscle doesn't contract in a linear plane because it does not
contain linear myofibrils.
How does myoglobin play a role in this capacity?
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Myoglobin is a protein much like hemoglobin that allows the cells to store
oxygen and allows for more efficient ATP production, thus reducing muscle
fatigue
mature bone cells surrounded by the calcified matrix are called
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osteocytes
what is the functional relationship?
Give this one a try later!
No, the functional relationship between RyR and DHPR is not a tip-link
mechanism. DHPR moves out of the way of RyR, exposing its calcium
channels.
TRUE OR FALSE: The majority of hormones are steroids.
Give this one a try later!
FALSE: The majority of hormones are polypeptides.
,Which of the following sequence of hormones accurately represents the body's
response to stress? Start with the hypothalamus output on the left.
Give this one a try later!
CRH → ACTH → Cortisol
In the adrenal cortex, the cells of the zona _____ primarily secrete cortisol and cells of
the zona ______ are the primary source of androgens.
Give this one a try later!
fasciculata; reticularis
When a sarcomere is at rest, what is the conformation of the myosin head? In other
words, is it pointing toward the M line or Z line?
Give this one a try later!
When a sarcomere is at rest, the myosin head is pointing towards the Z line.
How do muscle types differ?
Give this one a try later!
keletal muscle is attached to the skeleton, it is striated, and it is under
voluntary control. Cardiac muscle is the muscle of the heart, it is striated,
and it is under involuntary control. Smooth muscle is found in places like
, the GI tract and the vasculature, it is not striated, and it is under involuntary
control.
True or false: The endocrine system includes organs which are components of other
organ systems, such as the heart.
Give this one a try later!
TRUE: Many organs function as endocrine components and as part of other
organ systems, such as the heart, brain, kidneys, and GI tract.
A physiologically inactive precursor of a hormone is called a(n)
Give this one a try later!
prohormone or preprohormone
The length at which skeletal muscle fibers develop the greatest isometric active
tension is termed the
Give this one a try later!
optimal length
The hormone that is the major glucocorticoid secreted by the adrenal cortex is
, Give this one a try later!
cortisol
Why doesn't smooth muscle contract in a linear plane like skeletal and cardiac
muscle?
Give this one a try later!
Smooth muscle doesn't contract in a linear plane because it does not
contain linear myofibrils.
How does myoglobin play a role in this capacity?
Give this one a try later!
Myoglobin is a protein much like hemoglobin that allows the cells to store
oxygen and allows for more efficient ATP production, thus reducing muscle
fatigue
mature bone cells surrounded by the calcified matrix are called
Give this one a try later!
osteocytes
