Select the correct statement about the nephrons
A) Podocytes are the branching epithelial cells that line the tubules of the nephron.
B) The parietal layer of the glomerular capsule is simple squamous epithelium.
C) The glomerulus is correctly described as the proximal end of the proximal convoluted tubule.
D) Filtration slits are the pores that give fenestrated capillaries their name.
B
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Regarding its role as a neurotransmitter in the CNS, norepinephrineA) is secreted by brainstem neurons in response to sensory stimulation.B) amplifies weak sensory signals and dampens strong ones so that more information can reach conscious levels.C) is important for maintaining directed attention.D) is completely absent from the CNS, it is only used in the PNS.E) is only important for processing visual stimuli.
What will be an ideal response?
Answer the following statements true (T) or false (F)
1. In humans, melatonin may inhibit sexual maturation. 2. The antagonistic hormones that regulate the blood calcium level are calcitonin-parathormone. 3. The hormone that raises blood sugar levels is insulin. 4. Addison’s disease is due to a deficit output of glucocorticoids only. 5. Both "turn on" factors (hormonal, humoral, and neural stimuli) and "turn off" factors (feedback inhibition and others) may be modulated by the activity of the nervous system.
Many hadrosaur dinosaurs had elaborate structures on their heads that may have been social signals like the horns and antlers of mammals
What predictions can you make about the social behavior of hadrosaurs, and how could you use the fossil record to test those predictions?
Calcium-induced calcium release occurs when
A. the eflux of Ca2+ from the cell results in depolarization. B. Ca2+ entering through the plasma membrane stimulates release of Ca2+ from the sarcoplasmic reticulum. C. Ca2+ from the sarcoplasmic reticulum stimulates the movement of Ca2+ into the cell through the plasma membrane. D. Ca2+ is released from both the sarcoplasmic reticulum and the cardiac muscle cell.