endocrine system + plant reproduction no seeds

Difference between endo crine and exocrine cells?

Endocrine: hormones secreted directly into the bloodstream. No ducts on skin

Exocrine: secretions from glands on the surface of the skin

Which pancreatic cell produces insulin

Beta cells

Which pancreatic cell produces glucagon

Alpha cells

What happens when glucose levels are too high?

Beta cells are stimulated to release insulin, the insulin goes to the liver and the muscles, the liver converts glucose to glycogen and the muscle cells become more permeable to glucose and then glucose goes down

What happens when glucose levels are too low?

The alpha cells of the pancreas are stimulated, and it releases glucagon. The glucagon goes to the liver where glycogen is then broken down into glucose. Glucose levels increase

What happens when testosterone is too low?

Anterior pituitary gland is stimulated, fsh goes up LH goes up, testosterone increases and rate of sperm production increases

Advantages of sexual reproduction?

Genetic variation, species are less prone to disease and environmental change, can potentially make new species.

Disadvantages of sexual reproduction?

Takes long, needs more energy, produces feet offspring,flowering plants need polination to take place, new characteristics can be formed

Advantages of asexual reproduction

Fast, less energy needed, advantageous characteristics are copied exactly

Disadvantages of asexual reproduction

Offspring lack genetic variation, if disease of environmental change affects 1 it affects all