Ch 40 BIO
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What are the top part and the bottom part of epithelia called?
Apical surface and basal surface
What are the three types of connective tissue fibers?
Collagenous fibers, elastic fibers, reticular fibers.
Variation in animal body temp
- Poikilotherm: body temp varies with varying external environment
- Homeotherm: body temp relatively constant
Five general adaptations
help animals thermoregulate
3.Cooling by evaporative heat loss
5.Adjusting metabolic heat production
Types of connective tissue
- 1. Connective tissue proper
- -loose and dense
- 2. Special connective tissue
Loose connective tissue
Most widespread connective tissue in body. Binds epithelia to underlying tissues and holds organs in place. Consists of a loose weave of fibers.
Fibrous (dense) connective tissue
Dense with collagenous fibers that run in the same direction and are parallel to one another.
Special Connective Tissue
Blood, bone, cartilage
Consists of chondrin (extracellular gelatinous matrix) which may contain collagen. Interspersed with chondrocytes (which make the chondrin).
Collagen fibers of bone are surrounded by calcium salts. Haversion canal-> consists of blood vessels which supply osteocytes.
Cardiac muscle junctions are called what?
An animal's daily biological rhythm that changes certain homeostatic set points
Basal metabolic rate vs standard metabolic rate
- Basal-> minimum metabolic rate for an endotherm
- Standard->for ectotherm
A physiological state of decreased activity and metabolism.
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