Sains Bab 3 Ting. 3 Flashcards

1
Q

Apakah itu jantung?

A

Organ berotot dgn dinding terbina daripada otot kardium dan otot jantung

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2
Q

Berikan jenis sistem peredaran darah mamalia dan burung. And ciri2

A
  • sistem peredaran darah ganda dua, tertutup dan lengkap
    -mempunyai dua atrium dan ventrikel
    -darah beroksigen and terdeoksigen tidak bercampur.
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3
Q

Mengapakah ventrikel kiri memounyai dinding berotot yang lebih tebal berbanding ventrikel kanan?

A

Kerana ventrikel kiri perlu menghasilkan daya yg lebih besar untuk mengepam darah ke seluruh bdn.

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4
Q

Apakah alat yang digunakan utk mengukur tekanan darah?

A

Alat sfigmomanometer

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5
Q

Denyutan nadi dihasilkan oleh…

A

pengecutan dan oengenduran dinding arteri yg berotot.

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6
Q

Apakah fungsi darah?

A

Mengangkut oksigen dan nutrien ke seluruh bdn
Menyingkirkan karbon dioksia dan bahan kumuh lain dari bdn

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7
Q

Bagaimanakah kita boleh mengasingkan komponen darah manusia?

A

Kaedah emparan

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8
Q

Darah terdiri drpada(4)

A

Sel darah merah
Sel darah putih
Platlet
Plasma darah

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9
Q

Plasma darah adalah __% dlm darah

A

55%

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10
Q

Sel darah putih dan platlet adalah __% drpd darah

A

<1%

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11
Q

Sel darah merah adalah __%

A

45%

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12
Q

Fungsi :
-sel darah putih
-platlet
-sel darah merah

A

-lawan jangkitan penyakit
-membantu pembekuan darah
-mengangkut oksigen dan nutrien ke sdb

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13
Q

Plasma adalah 90% __ dan 10% __

A

Air, bhn perkumuhan

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