Exam 4 Flashcards Preview

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Flashcards in Exam 4 Deck (36)
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1
Q

This tissue has a basement membrane

A

Epithelial

2
Q

Lines blood vessels

A

Simple squamous

3
Q

Glands, lining of kidney tubules

A

Simple cubodial

4
Q

Lining of digestive tract, bronchi, and uterine tubes

A

Simple columnar

5
Q

Outer layer of skin

A

Stratified squamous

6
Q

Sweat gland duct, ovaries

A

Stratified cubodial

7
Q

Upper respiratory tract, vas deferens

A

Pseudostratified

8
Q

Characteristics of Epithelial tissue

A
  • Cellular
  • Avascular
  • Polar
  • Regenerates rapidly
9
Q

Free surface of epithelial tissue

A

apical

10
Q

Embryonic origin of epithelial tissue

A

All: endoderm, ectoderm, mesoderm

11
Q

Embryonic origin of Connective tissue

A

Mesoderm

12
Q

What tissue is tendons and ligaments?

A

Dense connective

13
Q

What tissue is between organs?

A

Loose connective

14
Q

Characteristics of Connective tissue

A
  • Vascualr
  • Extracellular matrix
  • Several types of cells
15
Q

Made up of long excitable, contractile cells

A

Muscle tissue

16
Q

Embryonic origin of connective tissue

A

Mesoderm

17
Q

Embryonic origin of nervous tissue

A

Ectoderm

18
Q

Tissue specialized to conduct impulses

A

Nervous

19
Q

Sensor and effector of negative feedback systems

A

Sensors monitor changes; if the value is too high or low the sensor activates an effector to counteract the change

20
Q

A neuron at rest has more potassium on the _____

A

Inside

21
Q

A neuron at rest has more sodium on the _____

A

Outside

22
Q

At rest the ____ channels are closed

A

Na +

23
Q

Which channel is always open?

A

K + leakage channel

24
Q

At rest the ______ is active.

A

Na +/K+ Pump

25
Q

Depolarization to threshold: A stimulus causes what to happen?

A
  • Na + channels to open briefly
  • Na + diffuses into the cell
  • Causes additional Na + channels to open
  • Cell reaches threshold potential
26
Q

What happens at peak depolarization?

A
  • Membrane reverses its polarity
  • Na + close
  • K + leaves the axon
  • Cells interior regains it negative charge
27
Q

Saltatory conduction

A

In the mylenated axons, Na + channels occur only at the odes of ranvier, action potentials jump from one node to the next which speeds up impulses

28
Q

Steps of action potential reaching the terminals

A
  1. Reaches terminal
  2. Triggers opening of ca ++ channels
  3. Ca ++ diffuses into the axonal terminal
  4. Vesicles move and fuse with membrane
  5. neurotransmitter released via exocytosis
  6. Neurotransmitter diffuses across synaptic cleft
  7. NT binds to receptor on postsynaptic cells synaptic cleft
  8. EPSP or IPSP generated in postsynaptic cell
  9. NT cleared from cleft
  10. Vesicles replenished, Ca++ channels shut
29
Q

Phermones

A

Communication chemicals between animals of the same species

30
Q

Endocrine characteristics

A
  • Ductless glands
  • Release chemicals into the blood
  • Prolonged actions
31
Q

What triggers 2nd messenger systems?

A

Water-soluable hormones

32
Q

What directly alters gene expression?

A

Lips-Soluable hormones

33
Q

Peptide hormones are _____-soluable

A

Water

34
Q

Steroid Hormones are ____-soluable

A

Lipid

35
Q

Water soluble is _____ acting

A

fast

36
Q

Lipid soluble is _____ acting

A

slow