Bio 2 Endocrine System and Reproduction

Endocrine Control

slow; hormones travel to target cells and often act for a long time, as they may alter gene transcriptions

True or False: All cells are potentially exposed to hormones.

True

Exocrine Glands

Have outflow tubes (ducts) that often exit the body

Endocrine Glands

Secrete substances into the blood; secrete hormones into the blood

3 Chemical Groups of Hormones

1. Peptide and Protein Hormones

2. Steroid Hormones

3. Amine Hormones

Peptide and Protein Hormones

• water soluble

• easily transported in the blood

• cannot cross cell membranes

• require exterior receptors

Steroid Hormones

• lipid soluble

• can pass through membranes

• interior receptors

Amine Hormones

• water or lipid soluble

• location of receptors depends on solubility

Adrenal Glands

• fight or flight response

• secrete epinephrine (adrenaline)

• secrete norepinephrine

What two things link the vertebrate nervous and endocrine systems?

hypothalamus and pituitary gland

2 Types of Asexual Reproduction

1. Budding

2. Fission

Budding

New individuals form from outgrowths on parent

Fission

Splitting of an individual to form another