Answer: A. Epinephrine functions as a hormone in the endocrine system and as a neurotransmitter in the nervous system.
Explanation: Epinephrine can act as a hormone and also as a neurotransmitter. Epinephrine can also be referred to as adrenaline.
The adrenaline is a hormone that is secreted mainly by the medulla of the adrenal glands and the Epinephrine primary function is to increase cardiac activities and also to increase the level of glucose in the blood. Its actions vary by tissue type and tissue expression of adrenergic receptors. Epinephrine acts on nearly all body tissues.
Answer/Explanation:
a. When pesticides is sprayed on the leaf, the population of non-resistant insects reduce drastically as many would not be able to survive or reproduce.
b. Resistant insects that are few initially would be able to survive the spray of pesticides. Overtime, these few resistant insects reproduce more offsprings that carry the resistant genes to these pesticides. As a result, the population of resistant insects become increased more than the non resistant insects.
Answer: d. none of the other answers
Explanation:
Enzymes that turn chemical energy into mechanical work are molecular motors.
There are three main components of cytoskeleton including microtubules, actin filaments and Intermediate filaments. Only actin filaments and microtubules carry the motor-driven transport on the cytoskeleton.
The most important feature of intermediate filaments is to provide the plasma membrane with mechanical support where it comes into contact with the extracellular matrix and other cells.
Unlike microtubules and microfilament , intermediate filaments are not involved in motility of the cells, hence do not associat with molecular motors.
Hence, the correct option is d.
Are this all the answer choices
