Lecture 1: Success Of Mammals Flashcards Preview

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Flashcards in Lecture 1: Success Of Mammals Deck (16):
1

Eutheria

Have a placenta and give birth to live young

2

Protheria

Egg-laying mammals

3

Metatheria

Give birth to live young, enter a ppuch and the young feed on milk (marsupials)

4

Colostrum

First secretion from mammary glands. Rich in antibodies

5

Benefits of lactation

Constant food source and enables survival from few numbers

6

Why does a reindeer have high fat content in milk?

Their environment has exteemely low temperatures therefore need a bigger layer of fat

7

Why does breast milk contain a low concentration of protein, moderate fat and high lactose?

1. Slow growth, 2. energy and 3. to maintain blood glucose and provide nutrients for the growing brain

8

What is lactose?

A disaccharide of glucose and galactose

9

Dam

The female parent of an offspring

10

Why can the mother and its young occupy the same territory?

The mother feeds the young so there is no competition between the two for food

11

How do young learn?

From the experience of their social group

12

Functions of the follicle stimulating hormone?

Stimulate sperm producion and egg release

13

Functions of the lutenising hormone

triggers ovulation and leydig cell production of testosterone

14

Functions of Oestrogen

Growth and development of mammary glands like breasts and menstrual cycle preparation

15

Functions of progesterone

Thickening the lining of the uterus and maintaining pregnancy

16

What is the difference between a menstrual cycle and oestrous cycle?

In the oestrous cycle, the uterine lining is reabsorbed. In the menstrual cycle, the lining is shed