Answer:
During secretion, the apocrine gland loses a portion of the cytoplasm. The cells are not destroyed.
Explanation:
Apocrine gland is a type of exocrine gland. The apocrine glands are present in the breast of the lactating mammals.
The apocrine secretion occurs when the release of secretory materials occurs along with the loss of a part of the cytoplasm.
During the apocrine secretion, the apocrine cells buds the secretions off through the plasma membrane and loses a part of its cytoplasm in the secretion. During the secretion, the cells are not destroyed.
Answer:
Foodborne infection/Food infection
Explanation:
Foodborne infection is caused by the ingestion of food containing live bacteria which grow and establish themselves in the human intestinal tract. Foodborne intoxication is caused by ingesting food containing toxins formed by bacteria which resulted from the bacterial growth in the food item.
Answer:
The correct answer will be:
1. Acetylcholine binds to receptors on the motor end plate
2. Chemically-regulated ion channels open, causing depolarization
3 End plate potentials trigger action potential(s).
4. Transverse tubules convey potentials into the interior of the cell
5. Ca++ is released from the sarcoplasmic reticulum
6. Ca++ binds to troponin, pulling on tropomyosin
7. Binding sites on actin are uncovered, allowing myosin to bind and carry out power strokes
8. Force increases.
9. Ca++ is pumped (re-sequestered) into the sarcoplasmic reticulum
10. Force decreases.
Explanation:
The muscle contraction is a highly controlled mechanism which begins at the neuromuscular junction with the release of the acetylcholine neurotransmitter. This neurotransmitter causes the depolarization of the membrane by binding to the receptors of the motor end plate which generates an action potential. This action potential is transmitted via T-tubules from sarcolemma to the sarcoplasmic reticulum.
The sarcoplasmic reticulum releases calcium ions which binds to the troponin protein. This troponin removes the protein tropomyosin from the actin causing the rotation of the tropomyosin exposing the binding sites for myosin. The myosin binds to the actin using energy from the ATP which pulls the actin causing contraction. Another ATP binds the myosin head which weakens the bond between myosin and actin which releases the myosin which decreases the force between them decreases and the muscles relax.
