Which of the following would be associated with the action of steroids on cells?
A) extracellular receptors with a specificity for only a single amino acid sequence on the hormone
B) an enzyme that catalyzes the formation of cyclic AMP
C) second-messenger systems
D) a hormone-receptor complex that interacts directly with the cell's DNA
D) a hormone-receptor complex that interacts directly with the cell's DNA
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Draw a diagram of the cerebral motor cortex and descending input to spinal motor neurons. Voluntary suppression of the knee jerk reflex originates in the motor cortex, which can send inhibitory signals to the motor neurons. If the left motor cortex is active, is the left or right knee jerk reflex suppressed or are both suppressed? Explain your answer. If the left side of the spinal cord at the
level of leg muscle control is damaged, is it the left or right knee jerk reflex that is suppressed or are both suppressed? What will be an ideal response?
The motor cortex on the frontal lobe is not the only brain region involved in motor control
Indicate whether the statement is true or false
An average value for vital capacity in healthy young adult males is ________
A) 3000 ml B) 4800 ml C) 6000 ml D) 500 ml
Where are the pressoreceptors and chemoreceptors (specialized sensory nerves that assist with the regulation of circulation and respiration) located?
A) Circle of Willis B) Cerebral arteries C) Abdominal aorta D) Carotid body