Question

Which type of leukocyte defends against parasitic infections? Lymphocytes Monocytes Neutrophils Erythrocytes Eosinophils Which ONE of the following triggers erythropoietin release? Increased blood CO_2 levels Infection in the blood Damage to a blood vessel wall and subsequent exposure to collagen Infection in the tissues Decreased blood oxygen levels Which ONE of the following statements about the autonomic nervous system is CORRECT? There are no synapses in the sympathetic ganglion chain. The spinal cord integrates emotional and motivational signals with autonomic signals. The autonomic nervous system lies outside the central nervous system. The autonomic nervous system operates without afferent input. Areas related to autonomic function in the brainstem regulate cardiovascular and respiratory function. The parasympathetic system has neurons that: originate in the middle levels of the spinal cord. cause an increase in heart rate. cause decreased gut motil

Answer 1

Answer lymphocytes defends our body from parasitic infections.

Answer Decreased blood oxygen levels.

Erythropoietin is a hormone produced by the kidney that promotes the formation of RBC by the bone marrow. The kidney cells that produces erythropoietin are sensitive to low oxygen levels in the blood that travels through the kidney.

Answer. Have short post ganglionic axons. Because stimulation of parasympathetic nervous system increase gut motility and decrease heart rate. Acetylcholine is the neurotransmitter.

Answer human erythrocyte develops from a committed myeloid stem cell. Average llife span of RBC is 120 days. Percentage of hemoglobinis around 33% of RBC. Not usually expressed as percentage, but as grams per deciliter (100 ml) Adult males: 14 to 18 gm/dL and Adult women: 12 to 16 gm/dL. It's diameter is approximately 6.2-8.2 micrometer.

Answer Niradrenaline acts on alpha receptors.

Because adrenaline acts on sympathetic nervous system i. e., on adrenergic receptors where as acetylcholine acts on cholinergic nervous system i. e., on muscaranic or nicotinic receptors. Adrenergic receptors are G protein coupled receptors. Muscaranic acetylcholine receptors are G protein coupled receptors